Throwback Master

Although you can get lucky and get this Trophy early in the game, there is a good place where you can claim this Trophy later on in the game. At the beginning of Chapter 22, when you get to bridge filled with enemies staying close to each other, take cover by the doorway facing them. Wait for them to throw a grenade at you. A timer will appear next to the grenade. Throw back the grenade by pressing the triangle button when the cursor is in the white-colored area. It may take a couple of tries before you get the timing right. The trophy should pop up when you've successfully killed two enemies.